Multiple choice

Which is nitrogen fixing bacteria

  1. Azolla

  2. Anabena

  3. Rhizobium

  4. All
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Anabaena and Rhizobium are well-known nitrogen-fixing bacteria. Although Azolla is a eukaryotic fern, it is frequently grouped with these organisms in agricultural contexts because it houses the nitrogen-fixing cyanobacterium Anabaena azollae.

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